Probably a little less than 30 hours per week until Mid-November then it was like 55-60 for the last month.
We aren't ranked, but I assume I was around top ten percentish
I think if you work too hard you are out of balance and that can be a detriment to some people. Most of the hardest working people I knew didn't do very well at all. Most of the laziest people I knew didn't do very well either. The people that read and outlined everything and used supplements sparingly seemed to have the most luck, but it is all a mixed bag. You need to study the amount you feel comfortable with, but knowing all the case names and all that will only do you good if the prof asks about it, but most don't. Most want you to be able to apply the rules to new situations in creative ways. This does not take much memorization, but does take familiarity and a great outline if the test is open book. My first semester all my tests were open book. In my second 2/4 were open book.